001 /* 002 * Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved. 003 * 004 * Project and contact information: http://www.cascading.org/ 005 * 006 * This file is part of the Cascading project. 007 * 008 * Licensed under the Apache License, Version 2.0 (the "License"); 009 * you may not use this file except in compliance with the License. 010 * You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, software 015 * distributed under the License is distributed on an "AS IS" BASIS, 016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 017 * See the License for the specific language governing permissions and 018 * limitations under the License. 019 */ 020 021 package cascading.flow.stream; 022 023 /** 024 * 025 */ 026 public class CloseReducingDuct<Group, Incoming, Outgoing> extends Duct<Incoming, Outgoing> implements CloseWindow, Reducing<Group, Outgoing> 027 { 028 public CloseReducingDuct( Duct<Outgoing, ?> next ) 029 { 030 super( next ); 031 } 032 033 @Override 034 public void receive( Duct previous, Incoming incoming ) 035 { 036 // do nothing 037 } 038 039 @Override 040 public void startGroup( Duct previous, Group group ) 041 { 042 } 043 044 @Override 045 public void completeGroup( Duct previous, Outgoing outgoing ) 046 { 047 next.receive( previous, outgoing ); 048 } 049 }